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Theatre Applications
For Dolby Digital AC3 or other 5.1 theatre systems, once the standard set-up for two-channel outlined above
is complete, the LFE output from the processor or receiver should be connected to the .1/LFE INPUT and
appropriate volume adjustments made using the .1/LFE level control. For this configuration, you must set the
processor to the “large” or “full range” setting for the left and right speakers in order for the REL to receive
the bass signal via the high-level cable. In this configuration, the REL provides support for both the left and
right speakers for two-channel listening, and support for the LFE when movies are playing. Most processors
will allow you to defeat the subwoofer output when listening in the two-channel mode. The effect of this
set-up is one of greatly increased dynamics in the mid-bass range, no bass bloat, and a greater degree of
space and timing from the special audio effects. For an even greater sense of space and impact, a second
REL connected in parallel to the centre channel will prove to be a dramatic improvement as well. And if that
is not enough fun, a rear REL, both to support the rear channel speakers as well as to evenly distribute LFE
through the room, truly completes the full-range sonic picture for state-of-the-art film reproduction.
Running In
Care taken during run in will be rewarded by many years of pleasurable use. Both the electronics and the
drive unit will benefit from an initial period of carefully controlled use. Possible damage may be sustained
by running in the unit at too high a volume setting over an extended period. On the other hand, by taking a
little care over this initial period, about 24 hours of actual use, a longer life with a higher potential eventual
performance is assured.
Care and Polishing
The cabinets are best maintained by using an automobile polish made by reputable manufacturers. Our
favorites are those made by Meguiars and Mother’s. If objects are to be placed upon the top, it is advisable
to use a small mat to protect the surface and to avoid the risk of rattles.
The SerieT/i models use an unusual method of bass loading. They are designed to operate below normal
system resonance. This has been achieved without the normal form of bass boost or electronic equalization.
Instead of a constantly increasing bass equalization response, we simply ensure there is sufficient amplifier
gain to drive the speaker unit to its maximum excursion level at whatever the designated lowest operating
frequency is, and then cut the bass at a controlled rate of 12dB per octave above this frequency. Although
this may at first seem identical to boosting the bass, it is actually quite different and ensures that the timing of
transients is far improved compared to the usual bass equalization used. Bass will sound cleaner and faster.
The amplifier is fully DC coupled to avoid phase shifts and compromises in its low end performance. It is
inherently stable and will retain its characteristics over very long periods of time – important in a unit
designed for an exceptionally long working life. These amplifiers are designed to withstand reasonable
abuse and overloads. If in doubt, please contact your dealer.
We believe that the importance of the electronics, cabinet and drivers being designed to work in harmony is
paramount. This approach allows the SerieT/i Sub-Bass Systems to achieve the highest possible level of fidelity.
Overload Protection
All REL Sub-Bass Systems are designed as true sub bass speakers. They are designed to reproduce those
exceptionally deep notes that are felt as well as heard. This it will attempt to do at whatever volume level you
set. If set too high no damage should result because the built-in electronics will limit the cone movement.
This electronic control is called Set-Safe™. It constantly and instantaneously monitors the output from the
power amplifier and is totally transparent in operation until required. This means it has absolutely no effect
on the sound quality of your REL until an overload is detected.
Ordinarily an overload would cause the power amplifier to go into clipping with resultant loss of control over
the drive unit. This can cause drive unit damage, and always sounds nasty. Set-Safe™ detects the point of
incipient clipping and gently soft-clips the waveform of the signal to ensure actual clipping does not occur.
This is a necessarily simplified description of what actually happens, but in effect, Set-Safe™ controls the
amplifier and ensures there is minimum risk of amplifier and driver damage caused by over-driving.
Technical
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